Messages in this thread | | | Date | Tue, 10 Oct 2023 04:57:58 +0100 | From | Matthew Wilcox <> | Subject | Re: [PATCH] sched/wait: introduce endmark in __wake_up_common |
| |
On Tue, Oct 10, 2023 at 11:28:33AM +0800, Bin Lai wrote: > Without this patch applied, it can cause the waker to fall into an > infinite loop in some cases. The commit 2554db916586 ("sched/wait: Break > up long wake list walk") introduces WQ_FLAG_BOOKMARK to break up long > wake list walk. When the number of walked entries reach 64, the waker > will record scan position and release the queue lock, which reduces > interrupts and rescheduling latency.
Maybe we could try removing bookmarks instead? There was a thread a while ago where we agreed they weren't actually useful any more.
Patches to follow ...
| |